Description

4-Amino-3-[(2,3-Dichlorophenyl)Azo]-5-Hydroxy-6-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonic acid groups, makes it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, stable colors with excellent fastness properties.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton, wool, and polyamide fibers, providing excellent wash and light fastness.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for inks, coatings, and plastics, where color strength and stability are paramount.
• Functional Dye Synthesis: Serves as a precursor for dyes used in non-textile applications, such as paper coloring, leather finishing, and food packaging inks.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry and photophysical properties.
• Analytical Chemistry: Can be employed as a staining agent or a complexometric indicator in specific analytical methodologies.

Basic Information

Product Name	4-Amino-3-[(2,3-Dichlorophenyl)Azo]-5-Hydroxy-6-[[4-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Azo]-2,7-Naphthalenedisulfonic Acid Trisodium Salt
CAS No.	73157-55-8
Molecular Formula	C24H16Cl2N6Na3O14S4
Molecular Weight	923.62 g/mol
Synonyms	Trisodium 4-amino-3-[(2,3-dichlorophenyl)diazenyl]-5-hydroxy-6-[[4-[2-(sulfonatooxy)ethylsulfonyl]phenyl]diazenyl]naphthalene-2,7-disulfonate; Reactive Dye Intermediate 73157-55-8; Azo Dye Precursor; C.I. Reactive Red 198 intermediate (related); 2,7-Naphthalenedisulfonic acid, 4-amino-3-[(2,3-dichlorophenyl)azo]-5-hydroxy-6-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, trisodium salt; Trisodium 4-amino-5-hydroxy-3,6-bis[(2,3-dichlorophenyl and 4-(2-sulfooxyethylsulfonyl)phenyl)azo]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical properties.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.